Tool-holder.



E. S. FREY & A. E. WRIGLEY.

TOOL HOLDER.

APPLICATION FILED MAY 11, 1916.

UNITED STATES PATENT OFFICE.

ERWIN S. FBEY AND ALBERT E. WRIGLEY, 0F BROOKLYN, NEW YORK.

TOOL-HOLDER.

Specification of Letters Patent.

Patented Sept. 18, 191 *7.

Application filed May 11, 1916. Serial No. 96,894.

To all whom it may concern:

Be it known that we, 1, ERWIN S. FREY, and 2, ALBERT E. WRIGLEY,citizens of the United States, residing at Brooklyn, in the county ofKings and State of New York, have invented certain new and usefulImprovements in T ool-Holders; and we do hereby declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

The invention relates to improvements in tool holders.

The object of the present invention is to improve the construction oftool holders and to provide a simple, practical and efficient toolholder of strong and durable construction equipped with means forsecurely and firmly holding the tool and capable of ready operation tolock and release the tool whereby the latter may be quickly placed inandremoved from the tool holder so that there will be no delay in changingtools.

With these and other objects in view, the invention consists in theconstruction and novel combination of parts hereinafter fully described,illustrated in the accompanying drawing, and pointed out in the claimshereto appended; it being understood that various changes in the form,proportion, size and minor details of construction, within the scope ofthe claims, may be resorted to without departing from the spirit orsacrificing any of the advantages of the invention.

In the drawing Figure 1 is a side elevation partly in sectionillustrating a tool holder embodying the invention,

Fig. 2 is a detail view of the tool,

Fig. 3 is a similar view of the locking screw.

Like numerals of reference designate corresponding parts in the severalfigures of the drawing.

In the drawing in which is illustrated the preferred embodiment of theinvention, 1 designates a tool holder consisting of a body provided witha head 2 having a reduced extension 3 and provided with a slot 4extending rearwardly from the front wall 5 of the head at the inner end.of the extension 3. The extension 3 has a fiat upper face 6 to receive atool '7 which has a fiat lower face 8 and a reduced inner portion 9extending into the slot .4. The extension 3 is provided in its upperface with a transverse groove 10 having a vertical rear wall 11 and aninclined front wall 12 which is undercut or dove-tailed to interlockwith an inclined or dove-tailed front edge 13 of a rib 14 disposedtransversely of the lower face 8 of the tool and formed integraltherewith and slidably interlocked with the extension 3 of the head ofthe holder.

The tool is locked and firmly held in the slot and groove of the head ofthe holder by a locking screw 15 arranged at an inclina tion anddisposed at an obtuse angle to the upper face 6 of the extension 3 andmounted in a threaded opening 16. The screw is provided at its innerengaging end with a cam 17 tapered downwardly and set at a slight angleand formed by a smooth eccentrically disposed tapered portion which fitsin a recess 18 in the rear edge of the reduced portion 9 of the tool.The recess 18 has a curved wall 19 and a flat bottom wall 20 and thescrew is adapted to be rotated approximately one-half a revolution tocarry its cam portion engagement with the wall of the recess 18 and alsowith the bottom of the same. This forces the tool forwardly or outwardlyto bind the dovetailed portion of the rib against the inclined ordove-tailed portion of the groove at the same time the flat end face 21of the cam bears against the flat bottom of the recess and clamps thetool against the bottom of the slot. It will thus be seen thatapproximately one-half a revolution of the locking screw carries the camto and from its locking position and that the tool may be instantlyclamped and released. The screw is provided at its outer end with apolygonal wrench receiving portion 22 but any other suitable means mayof course be employed for enabling the screw to be rotated to clamp andrelease the tool.

The engagement of the cam with the recess at the inner or rear edge ofthe tool positively locks the tool against lateral movement so that thetool cannot become displaced from the groove even when the screw thelatter being provided with a transverse groove, a tool having a ribfitted in the groove, said tools being also extended into the slot andan inclined angularly disposed locking screw having a cam arranged toengage the tool and force the rib into tight engagement with theextension, said screw being also adapted to force the cam downwardlvagainst the tool to clamp the same against the head.

2. A device of the class described including a body provided with a headhaving an extension, said extension being provided with a transversegroove having a dovetailed front wall, a tool having a dove-tailed ribfitted in the said groove, said tool being also provided with a recessand an angularly disposed screw having a cam arranged to engage therecess to force the tool outwardly and downwardlv whereby the tool islocked against the head and the rib forced into interlocking engagementwith the front wall of the groove.

A device of the class described including a body having a head providedwith an extension and having a slot at the inner end thereof, said headbeing provided with a dove-tailed transverse groove, a tool having areduced rear portion and fitted in the slot and provided with a bottomtransveisely disposed dove-tailed rib slidably interlocked with the saidgroove, said reduced portion being also provided with a recess at theinner or rear edge and an inclined locking screw mounted. in the headand having a tapered eccentrically arranged portion fornr ing a cani'andarranged to engage in the recess of the tool for forcing the tool ontwardly and also downwardly and locking the tool against lateralmovement.

In testimony whereof we ailix our signatures in presence of twowitnesses.

ERVVIN S. FREY. ALBERT E. XVRIGLEY. Witnesses:

HERMAN MAYER, DIEDRIoH G. \VEDEKIND.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. 0.

